Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quais espaçonaves foram lançadas pelo Titan II?
 ###Tabelas: CREATE TABLE 2012_events (2012_events_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Event # VARCHAR, Event VARCHAR, Winner VARCHAR, Prize VARCHAR, Entries VARCHAR, Prize Pool VARCHAR, Elapsed Time VARCHAR) CREATE TABLE non-electronic-paper_displays (non-electronic-paper_displays_id AUTO_INCREMENT PRIMARY KEY, Maker VARCHAR, Model VARCHAR, Intro year VARCHAR, Screen size (inch) VARCHAR, Screen type VARCHAR, Weight VARCHAR, Screen pixels VARCHAR, Hours reading VARCHAR, Touch screen VARCHAR, Wireless network VARCHAR, Internal storage VARCHAR, Card reader slot VARCHAR) CREATE TABLE disaster_relief (disaster_relief_id AUTO_INCREMENT PRIMARY KEY, Disaster VARCHAR, Year VARCHAR, Countries Affected VARCHAR, Scale of Disaster VARCHAR, People Assisted VARCHAR, Nature of Help VARCHAR) CREATE TABLE career_nascar_statistics (career_nascar_statistics_id AUTO_INCREMENT PRIMARY KEY, Year INT, Races INT, Wins INT, Poles INT, Top 5 INT, Top 10 INT, DNF INT, Finish VARCHAR, Start VARCHAR, Winnings VARCHAR, Season Rank VARCHAR, Team(s) VARCHAR) CREATE TABLE spaceports_with_achieved_vertical_launches_of_humans (spaceports_with_achieved_vertical_launches_of_humans_id AUTO_INCREMENT PRIMARY KEY, Spaceport VARCHAR, Launch complex VARCHAR, Launcher VARCHAR, Spacecraft VARCHAR, Flights VARCHAR, Years VARCHAR)  
SELECT Spacecraft FROM spaceports_with_achieved_vertical_launches_of_humans WHERE Launcher = titan ii